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refactor: extract typed spectrum math

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This commit is contained in:
sjg
2026-08-01 18:19:02 +02:00
parent e300cc343d
commit 5136704826
4 changed files with 213 additions and 138 deletions
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src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/app.js
+82 -77
View File
@@ -461,6 +461,69 @@
return Math.max(stepBw, Math.round(clamped / stepBw) * stepBw);
}
// src/features/spectrum/math.ts
function isNumericBins(value) {
return Array.isArray(value) ? value.every((item) => typeof item === "number") : ArrayBuffer.isView(value) && !(value instanceof DataView);
}
var base64Lookup = new Uint8Array(128).fill(255);
var base64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for (let index = 0; index < base64Alphabet.length; index += 1) {
base64Lookup[base64Alphabet.charCodeAt(index)] = index;
}
var spectrumBinBuffer = new Int8Array(0);
function decodeBase64Int8(value) {
let end = value.length;
while (end > 0 && value.charCodeAt(end - 1) === 61) end -= 1;
const outputLength = end * 3 >>> 2;
if (spectrumBinBuffer.length !== outputLength) spectrumBinBuffer = new Int8Array(outputLength);
let outputIndex = 0;
for (let index = 0; index < end; ) {
const sextets = [0, 0, 0, 0];
for (let offset = 0; offset < 4 && index < end; offset += 1, index += 1) {
const code = value.charCodeAt(index);
const decoded = code < base64Lookup.length ? base64Lookup[code] : void 0;
if (decoded === void 0 || decoded === 255) throw new TypeError("Invalid base64 spectrum frame");
sextets[offset] = decoded;
}
const packed = (sextets[0] ?? 0) << 18 | (sextets[1] ?? 0) << 12 | (sextets[2] ?? 0) << 6 | (sextets[3] ?? 0);
if (outputIndex < outputLength) spectrumBinBuffer[outputIndex++] = packed >> 16 & 255;
if (outputIndex < outputLength) spectrumBinBuffer[outputIndex++] = packed >> 8 & 255;
if (outputIndex < outputLength) spectrumBinBuffer[outputIndex++] = packed & 255;
}
return spectrumBinBuffer;
}
var nthScratch = new Float64Array(0);
function nthElement(values, target) {
if (values.length === 0 || target < 0 || target >= values.length) return null;
if (nthScratch.length < values.length) nthScratch = new Float64Array(values.length);
for (let index = 0; index < values.length; index += 1) nthScratch[index] = values[index] ?? 0;
let low = 0;
let high = values.length - 1;
while (low < high) {
const pivot = nthScratch[low + (high - low >> 1)] ?? 0;
let left = low;
let right = high;
while (left <= right) {
while ((nthScratch[left] ?? Infinity) < pivot) left += 1;
while ((nthScratch[right] ?? -Infinity) > pivot) right -= 1;
if (left <= right) {
const temporary = nthScratch[left] ?? 0;
nthScratch[left] = nthScratch[right] ?? 0;
nthScratch[right] = temporary;
left += 1;
right -= 1;
}
}
if (right < target) low = left;
if (target < left) high = right;
}
return nthScratch[target] ?? null;
}
function estimateNoiseFloorDb(bins) {
if (!isNumericBins(bins) || bins.length === 0) return null;
return nthElement(bins, Math.floor(bins.length * 0.15));
}
// src/app.js
void loadDecoderRegistry(refreshOperatorLayoutCapabilities);
var authRole = null;
@@ -1814,7 +1877,7 @@
return { startIdx, endIdx };
}
function pushOverviewWaterfallFrame(data) {
if (!overviewCanvas || !data || !isBinsArray(data.bins) || data.bins.length === 0) return;
if (!overviewCanvas || !data || !isNumericBins(data.bins) || data.bins.length === 0) return;
overviewWaterfallRows.push(data.bins.slice());
overviewWaterfallPushCount++;
trimOverviewWaterfallRows();
@@ -1869,7 +1932,7 @@
overviewWfTexHeight = iH;
ensureWaterfallLut(pal, minDb, maxDb);
function renderRow(dstY, srcBins) {
if (!isBinsArray(srcBins) || srcBins.length === 0) return;
if (!isNumericBins(srcBins) || srcBins.length === 0) return;
const { startIdx, endIdx } = overviewVisibleBinWindow(lastSpectrumData, srcBins.length);
const spanBins = Math.max(1, endIdx - startIdx);
const rowBase = dstY * rowStride;
@@ -2440,7 +2503,7 @@
});
}
function spectrumBinIndexForHz(data, hz) {
if (!data || !isBinsArray(data.bins) || data.bins.length < 2 || !Number.isFinite(hz)) {
if (!data || !isNumericBins(data.bins) || data.bins.length < 2 || !Number.isFinite(hz)) {
return null;
}
const maxIdx = data.bins.length - 1;
@@ -2454,7 +2517,7 @@
return 10 ** (clamped / 10);
}
function sweetSpotCandidateForFrame(data, freqHz, bandwidthHz) {
if (!data || !isBinsArray(data.bins) || data.bins.length < 16) {
if (!data || !isNumericBins(data.bins) || data.bins.length < 16) {
return null;
}
if (!Number.isFinite(freqHz) || !Number.isFinite(bandwidthHz) || bandwidthHz <= 0) {
@@ -4590,7 +4653,7 @@ ${unsupportedBandSummary()}`;
currentStyle,
cssColorToRgba,
rgbaWithAlpha,
isBinsArray,
isBinsArray: isNumericBins,
estimateNoiseFloorDb,
spectrumVisibleRange,
drawSpectrum,
@@ -4938,7 +5001,7 @@ ${unsupportedBandSummary()}`;
if (!sdrSquelchSupported) return;
let pct = 0;
const data = lastSpectrumData || window.lastSpectrumData;
if (data && isBinsArray(data.bins) && data.bins.length > 0) {
if (data && isNumericBins(data.bins) && data.bins.length > 0) {
const noiseDb = estimateNoiseFloorDb(data.bins);
if (noiseDb != null && Number.isFinite(noiseDb)) {
const thresholdDb = noiseDb + 6;
@@ -6129,34 +6192,6 @@ ${unsupportedBandSummary()}`;
var waterfallGamma = 1;
var SPECTRUM_HEADROOM_DB = 20;
var SPECTRUM_SMOOTH_ALPHA = 0.42;
var _b64Lut = new Uint8Array(128);
for (let i = 0; i < 128; i++) _b64Lut[i] = 255;
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("").forEach((c, i) => {
_b64Lut[c.charCodeAt(0)] = i;
});
var _spectrumBinI8 = new Int8Array(0);
function isBinsArray(v) {
return Array.isArray(v) || ArrayBuffer.isView(v);
}
function decodeBase64ToInt8(b64) {
let end = b64.length;
while (end > 0 && b64.charCodeAt(end - 1) === 61) end--;
const outLen = end * 3 >>> 2;
if (_spectrumBinI8.length !== outLen) _spectrumBinI8 = new Int8Array(outLen);
const out = _spectrumBinI8;
let j = 0;
for (let i = 0; i < end; ) {
const a = _b64Lut[b64.charCodeAt(i++)];
const b = i < end ? _b64Lut[b64.charCodeAt(i++)] : 0;
const c = i < end ? _b64Lut[b64.charCodeAt(i++)] : 0;
const d = i < end ? _b64Lut[b64.charCodeAt(i++)] : 0;
const n = a << 18 | b << 12 | c << 6 | d;
if (j < outLen) out[j++] = n >> 16 & 255;
if (j < outLen) out[j++] = n >> 8 & 255;
if (j < outLen) out[j++] = n & 255;
}
return out;
}
var spectrumCrosshairX = null;
var spectrumCrosshairY = null;
var _bwDragEdge = null;
@@ -6231,13 +6266,13 @@ ${unsupportedBandSummary()}`;
let removeCount = 0;
for (let i = 0; i < spectrumPeakHoldFrames.length; i++) {
const f = spectrumPeakHoldFrames[i];
if (f && isBinsArray(f.bins) && now - f.t <= holdMs) break;
if (f && isNumericBins(f.bins) && now - f.t <= holdMs) break;
removeCount++;
}
if (removeCount > 0) spectrumPeakHoldFrames.splice(0, removeCount);
}
function pushSpectrumPeakHoldFrame(frame) {
if (!frame || !isBinsArray(frame.bins) || frame.bins.length === 0) {
if (!frame || !isNumericBins(frame.bins) || frame.bins.length === 0) {
clearSpectrumPeakHoldFrames();
return;
}
@@ -6256,56 +6291,26 @@ ${unsupportedBandSummary()}`;
}
function buildSpectrumPeakHoldBins(currentBins) {
const holdMs = Math.max(0, Number.isFinite(overviewPeakHoldMs) ? overviewPeakHoldMs : 0);
if (holdMs <= 0 || !isBinsArray(currentBins) || currentBins.length === 0) {
if (holdMs <= 0 || !isNumericBins(currentBins) || currentBins.length === 0) {
return null;
}
pruneSpectrumPeakHoldFrames();
if (spectrumPeakHoldFrames.length === 0) return null;
const peakBins = currentBins.slice();
for (const frame of spectrumPeakHoldFrames) {
if (!frame || !isBinsArray(frame.bins) || frame.bins.length !== peakBins.length) continue;
if (!frame || !isNumericBins(frame.bins) || frame.bins.length !== peakBins.length) continue;
for (let i = 0; i < peakBins.length; i++) {
if (frame.bins[i] > peakBins[i]) peakBins[i] = frame.bins[i];
}
}
return peakBins;
}
function estimateNoiseFloorDb(bins) {
if (!isBinsArray(bins) || bins.length === 0) return null;
const k = Math.floor(bins.length * 0.15);
return nthElement(bins, k);
}
function nthElement(arr, k) {
const tmp = _nthScratch.length >= arr.length ? _nthScratch : new Float64Array(arr.length);
if (tmp.length > _nthScratch.length) _nthScratch = tmp;
for (let i = 0; i < arr.length; i++) tmp[i] = arr[i];
let lo = 0, hi = arr.length - 1;
while (lo < hi) {
const pivot = tmp[lo + (hi - lo >> 1)];
let i = lo, j = hi;
while (i <= j) {
while (tmp[i] < pivot) i++;
while (tmp[j] > pivot) j--;
if (i <= j) {
const t = tmp[i];
tmp[i] = tmp[j];
tmp[j] = t;
i++;
j--;
}
}
if (j < k) lo = i;
if (k < i) hi = j;
}
return tmp[k];
}
var _nthScratch = new Float64Array(0);
var _smoothBins = [];
function buildSpectrumRenderData(frame) {
if (!frame || !isBinsArray(frame.bins)) return frame;
if (!frame || !isNumericBins(frame.bins)) return frame;
const n = frame.bins.length;
const prev = lastSpectrumRenderData;
const canBlend = prev && isBinsArray(prev.bins) && prev.bins.length === n && prev.sample_rate === frame.sample_rate && prev.center_hz === frame.center_hz;
const canBlend = prev && isNumericBins(prev.bins) && prev.bins.length === n && prev.sample_rate === frame.sample_rate && prev.center_hz === frame.center_hz;
if (_smoothBins.length !== n) _smoothBins = new Array(n);
const src = frame.bins;
if (canBlend) {
@@ -6339,7 +6344,7 @@ ${unsupportedBandSummary()}`;
return range.visLoHz + cssX / cssW * range.visSpanHz;
}
function nearestSpectrumPeak(cssX, cssW, data) {
if (!data || !isBinsArray(data.bins) || data.bins.length === 0 || cssW <= 0) {
if (!data || !isNumericBins(data.bins) || data.bins.length === 0 || cssW <= 0) {
return null;
}
const bins = data.bins;
@@ -6400,7 +6405,7 @@ ${unsupportedBandSummary()}`;
return nearestSpectrumPeakHz(cssX, cssW, data) ?? Math.round(canvasXToHz(cssX, cssW, range));
}
function visibleSpectrumPeakIndices(data, limit = 24) {
if (!data || !isBinsArray(data.bins) || data.bins.length < 3) {
if (!data || !isNumericBins(data.bins) || data.bins.length < 3) {
return [];
}
const bins = data.bins;
@@ -6470,7 +6475,7 @@ ${unsupportedBandSummary()}`;
const sampleRate = Number(evt.data.slice(commaA + 1, commaB));
const b64 = evt.data.slice(commaB + 1);
const hadSpectrum = !!lastSpectrumData;
const bins = decodeBase64ToInt8(b64);
const bins = decodeBase64Int8(b64);
const rds = lastSpectrumData?.rds;
lastSpectrumData = { bins, center_hz: centerHz, sample_rate: sampleRate, rds };
window.lastSpectrumData = lastSpectrumData;
@@ -6914,7 +6919,7 @@ ${unsupportedBandSummary()}`;
spectrumTmpFillPoints.push(binX(i), binYFromBins(bins, i));
}
spectrumGl.drawFilledArea(spectrumTmpFillPoints, H, cssColorToRgba(pal.spectrumFill));
if (isBinsArray(peakHoldBins) && peakHoldBins.length === n) {
if (isNumericBins(peakHoldBins) && peakHoldBins.length === n) {
spectrumTmpPeakPoints.length = 0;
for (let i = 0; i < n; i++) {
spectrumTmpPeakPoints.push(binX(i), binYFromBins(peakHoldBins, i));
@@ -7011,7 +7016,7 @@ ${unsupportedBandSummary()}`;
window.addEventListener("resize", _updateCachedCanvasSizes);
_updateCachedCanvasSizes();
function pushSpectrumWaterfallFrame(data) {
if (!spectrumWaterfallCanvas || !data || !isBinsArray(data.bins) || data.bins.length === 0) return;
if (!spectrumWaterfallCanvas || !data || !isNumericBins(data.bins) || data.bins.length === 0) return;
spectrumWfRows.push(data.bins.slice());
spectrumWfPushCount++;
trimSpectrumWaterfallRows();
@@ -7067,7 +7072,7 @@ ${unsupportedBandSummary()}`;
spectrumWfTexHeight = iH;
ensureWaterfallLut(pal, minDb, maxDb);
function renderRow(dstY, srcBins) {
if (!isBinsArray(srcBins) || srcBins.length === 0) return;
if (!isNumericBins(srcBins) || srcBins.length === 0) return;
const { startIdx, endIdx } = overviewVisibleBinWindow(lastSpectrumData, srcBins.length);
const spanBins = Math.max(1, endIdx - startIdx);
const rowBase = dstY * rowStride;
@@ -7528,7 +7533,7 @@ ${unsupportedBandSummary()}`;
} else {
let auto = 30;
const data = lastSpectrumData || window.lastSpectrumData;
if (data && isBinsArray(data.bins) && data.bins.length > 0) {
if (data && isNumericBins(data.bins) && data.bins.length > 0) {
const noiseDb = estimateNoiseFloorDb(data.bins);
if (noiseDb != null && Number.isFinite(noiseDb)) {
const thresholdDb = noiseDb + 6;